# Tool and Related Domain Objects
In this chapter, we will highlight tool and related core domain objects. We have omitted their corresponding code parts. If you wish to learn more, please read the [API Reference](../../Tech_Capabilities/Others/API_Reference.md) Section.

## Tool Base Class
Package path: `agentuniverse.agent.action.tool.tool.Tool`

## Tool Manager
Package path: `agentuniverse.agent.action.tool.tool_manager.ToolManager`

## Input Object
Package path: `agentuniverse.agent.action.tool.tool.ToolInput`
